How to increase polymorph duration?

[redscoutyt2 3]

Hi everyone! First of all, sorry for my bad English.
I've tried to increase dwDuration in polymorph.cpp but it doesn't go over 35 minutes, how can I solve it?
I did this:
 

bool CPolymorphUtils::PolymorphCharacter(LPCHARACTER pChar, LPITEM pItem, const CMob* pMob, LPCHARACTER ch)
{
	bool hasTriceratops = false;

	switch (pChar->GetSkillMasterType(POLYMORPH_SKILL_ID))
	{
		if (ch->FindAffect(AFFECT_TRICERATROPSZ))
			hasTriceratops = true;
		case SKILL_PERFECT_MASTER:
			//dwDuration = 35;
			//break;
			if (hasTriceratops == true)
			{
				dwDuration = 40;
				break;
			}
			else
			{
				dwDuration = 55;
				break;
			}

I even increased dwDuration in the else function just to make sure it goes over 35 but it doesnt.
Can someone help me?
Thank you!

[redscoutyt2 3]

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[redscoutyt2 3]

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[redscoutyt2 3]

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